Question

sin 25 degree/sin 65 degree+ cos25 degree /cosec 65 degree​

Answer 1

Answer:TRIGNOMATRIC VALUES :

TO FIND :-

WE HAVE TO FIND THE VALUE OF

SOLUTION : -

WE KNOW THAT

hence ,

ALSO WE KNOW THAT ,

hence,

NOW BUT EQUATION 1 AND EQUATION 2 IN

OTHER INFORMATION :-

TRIGNOMETRIC IDENTITIES :-

SIN²∅ + COS²∅ = 1

SEC²∅ - TAN²∅ = 1

COSEC²∅ - COT²∅ = 1

TRIGNOMETRIC COMPLEMENTARY ANGLES :-

SIN 90 = COS ( 90 - ∅ )

COS 90 = SIN ( 90 - ∅ )

TAN 90 = COT ( 90 - ∅ )

COT 90 = TAN ( 90 - ∅ )

COSEC 90 = SEC ( 90 - ∅ )

SEC 90 = COSEC ( 90 - ∅ )

TRIGNOMATERIC RATIOS :-

SIN ∅ = 1/ COSEC ∅

COS ∅ = 1/ SEC ∅

TAN ∅ = 1/ COT ∅

TAN ∅ = SIN ∅ / COS ∅

COT ∅ = COS ∅ / SIN ∅

Answer 2

Answer:

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