Introduction to Trigonometry
Express 1+sinA1−sinA as sec A-tanA
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The value of (4tan2A−4sec2A) is equal to :
If 5tanθ=4 then 5sinθ+2cosθ5sinθ−3cosθ is equal to
Simplify: sec x - tan xsec x + tan x
Without using trigonometric tables, prove that:(sin65o+cos25o )(sin65o−cos25o )=0
Prove the following :
Prove that: (1−cotθ ) sinθ +(1−tanθ ) cosθ =cosθ +sinθ
For an acute angle θ in a right angled triangle, tanθ=