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## Homework Statement

i have solve a engineering problem until this part i'm stuck

C cos 30 - 1.375 cosθ = 0 ----(1)

C sin 30 + 1.375 sin θ = 15 ---(2)

. i have 2 unknown C and θ, however the change to cos to sin or via versa make me lost because of my poor mathematic

## Homework Equations

## The Attempt at a Solution

i have try changing the sin θ to √(1-cos 2θ)/2 but i still did not get the right answer

i hope that i can have a guide to solve this by using equation funtion in scientific calculator or do it manually.

TQ in advance