# 31 - General Trigonometry Questions Answers

If a cos∅ + b sin∅ =c, then prove that asin∅-bcos∅=±√a²+b²-c²

**Asked By: VAIBHAV PARIHAR**4 year ago

is this question helpfull: 10 2

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sin^{4}A+cos^{4}A

**Asked By: DEVRAJ SHARMA**4 year ago

is this question helpfull: 5 1

**read solutions ( 1 ) | submit your answer**cos20.cos40.cos60.cos80=

**Asked By: C NARENDRA CHARY**4 year ago

is this question helpfull: 5 2

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3sin ^{2}A +4 cos^{2}A max and min value and solve

**Asked By: MRITYUNJAY**4 year ago

is this question helpfull: 6 0

**read solutions ( 1 ) | submit your answer**if A is an acute angle and cotA+cosecA=3 , find value of sinA

**Asked By: NIRMALJIT SINGH**4 year ago

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tan^2 A + cot^2 A can never be less than 2

**Asked By: SALONI**4 year ago

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**submit your answer**Prove that 2sin^2 x+ 4sinxcosycos(x+y)+cos2(x+y)=cos2x

**Asked By: CAROLNAVYA**4 year ago

is this question helpfull: 2 3

**submit your answer**Prove that 2sin^2 x+ 4sinxcosycos(x+y)+cos2(x+y)=cos2x

**Asked By: CAROLNAVYA**4 year ago

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if 1 + sinA = 9 cos*A and A belongs to first quadrant then the value of 5(1- cosA ) =*

**Asked By: SYAM SUNDER**5 year ago

is this question helpfull: 7 5

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if 1 + sinA = 9 cos*A and A belongs to first quadrant then the value of 5(1- cosA ) =*

**Asked By: SYAM SUNDER**5 year ago

is this question helpfull: 3 2

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