Find the value of sin 75o
If sec θ = √2 and θ lies in IV quadrant, find the value of
-1
+1
2
-2
sin (n+1 )x sin ( n + 2 ) x + cos ( n + 1 )x cos ( n + 2 ) x = _________.
cos x
Sin x
Tan x
sec x
sin x
tan x
cot x
If α and β are acute angle such that tan α = m / m + 1 and tan β = 1/2m+1. Then find the value of α + β.
π
π/4
π/2
π/3
