What is cos(90-θ)+sin(θ) ?

The solution to cos(90-θ)+sin(θ) is 2sin(θ)

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simplify cos(90-θ)+sin(θ)

simplify

cos (9 0^{\circ} - θ) + sin (θ)

2 sin (θ)

Solution steps

cos (9 0^{\circ} - θ) + sin (θ)

Rewrite using trig identities

= sin (θ) + sin (θ)

Add similar elements:

sin (θ) + sin (θ) = 2 sin (θ)

= 2 sin (θ)

cos (2 x - \frac{2 π}{3})

2.5 cos (1.4 t + 0.7)

4 - (4 cos^{2} (x))

\frac{sin ( x )}{cos ( x )} - ln (x)

tan (θ) + tan (θ + π) + tan (θ + 2 π)